SiO-Sn_(2)Fe@C composites with uniformly distributed Sn_(2)Fe nanoparticles as fast-charging anodes for lithium-ion batteries
作者机构：School of Materials Science and EngineeringGuangdong Provincial Key Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhou 510640China School of Materials Science and EngineeringGeorgia Institute of TechnologyAtlantaGA30332USA
出 版 物：《eScience》 (电化学与能源科学（英文）)
年 卷 期：2023年第3卷第1期
页 面：62-70页
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学]
基 金：This work was supported by the National Natural Science Foundation of China(grant numbers 52001124 52071144 51831009 and 51621001)
主 题：SiO based Sn_(2)Fe Lithium-ion batteries Anodes Fast-charging
摘 要：SiO-based materials represent a promising class of anodes for lithium-ion batteries(LIBs),with a high theoretical capacity and appropriate and safe Li-insertion ***,SiO experiences a large volume change during the electrochemical reaction,low Li diffusivity,and low electron conductivity,resulting in degradation and low rate capability for ***,we report on the rapid crafting of SiO–Sn_(2)Fe@C composites via a one-step plasma milling process,leading to an alloy of Sn and Fe and in turn refining SiO and Sn_(2)Fe into nanoparticles that are well dispersed in a nanosized,few-layer graphene *** Sn and Fe nanoparticles generated during the first Li-insertion process form a stable network to improve Li diffusivity and electron *** an anode mate-rial,the SiO–Sn_(2)Fe@C composite manifests high reversible capacities,superior cycling stability,and excellent rate *** capacity retention is found to be as high as 95%and 84%at the 100th and 300th cycles under 0.3 *** rate capability testing at 3,6,and 11 C,the capacity retentions are 71%,60%,and 50%,*** study highlights that this simple,one-step plasma milling strategy can further improve SiO-based anode materials for high-performance LIBs.
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